Vaporizer for internal-combustion engines



April 27 1926. 1,582,654

R. M. ANDERSON VAPORIZER FOR INTERNAL COMBUSTION ENGINES Original Filed Sept. 1. 1920 Patented 27, 1926.

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Application filed September 1, ieaaserial no. 407,509. Renewed September 21, 1925.

To all whom it ma comer-n:

Be it known that" RAYMOND M. 'ANDER- son, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain newand useful Improvements in Vaporizers for Internal-Combustion Engines, of which the following is a specification. 7

Thisinvention relates to improvements in *vaporizers for internal combustion engines.

The; purpose of this invention is to combine with an exhaust-heated vaporizer of the type in which a hot rich mixture is diluted with the main body of air, the latter being unheated so as not to reduce the charge density, an independent heating burner or lamp, which will suppl a constant amount of heat to compensate orthe' variable heat supplied by the exhaust, and which will, es-: pecially, supply the necessary quantity 0 heat to enable an engine ofthe four-cycle type to operate at low loads with kerosene as fuel, the temperature of the exhaust under these conditions being lower than that required for the complete vaporization-of the kerosene.

,This device also eliminates'thelnecessity for fitting a gasoline priming attachment t0 a kerosene vaporizer.

The figure shows the vaporizer together withthe mixing chamber and float chamber. In the figure: i The float'chamber A supplies a fuel nozzleB, which delivers'fuel into the coil C, which is heated by the vaporizer D, which vaporizer is divided into two parts by the partition E. The lower half .of the vaporizer is heated by the annular lamp F, which may be of any well-known type. The annular lamp Fis furnished with fuel from the float chamber Gr, which obtains its fuel from the same ipe as does the float chamber A, which furnis es fuel to the coil 0.

The upper portion of the vaporizer D is heated by theexhaust which is controlled by the valve H, so that .whenthe valve is. lowered so that its lower edge is incontact with the partition E, the coil C receives heat indirectly onl haust, the constant heat rom the burner F be'n unafiected thereby, and when the valve I -1 israised to its uppermost posithe exhaust then flows from Q to P tion,

as shown by the dotted through the coili arrows, The va ve H theiefore acts as from the ex-.

a shunt to control the exhaustheat in the 1 well known manner. A small portion of the exhaust which escapes with the products ofcombustion from the lamp F assists the draft inthe lamp chimney. The coil C is connected to the mixing chamber J, which pro vides two paths for the vapor, namely-K, delivered into a restricted portion L, of the Imxm chamber, and M, which delivers in the vi inity adjacent to the throttle N, located in the outlet of the mixing chamber J.- This portion of the devicecorresponds to that shown in my co-pending application,

Serial No. 412,060, filed September 22, 1920. The throttle is used for starting purposes only. The exhaust which heatsthe upper portion of the vaporizer D arrives by the pipe Q and leaves by the pipe P. The exhaust is'controlled by the valve-Tl. by means i of the shaft R which is guided in the pipe P and is moved by a bell crank lever S, which turns on a fulcrum T, which fulcrum is located on the bracket U projecting from the pipe P.

Operation as follows:

The operation of the device is Before startin the engine, the lamp F is lighted and the s utter O is partially closed,

and the engine is cranked in the usual way.

The rich mixture supplied through C is then admitted to the engine above the throttle .N, with such air as leaks past the throttle O. The exhaust control H is raised to the upper position so as to give a maximum amount of heat to the coil C.

When J the engine has been run for a minute, the throttle 0 may be opened, and, after the engine has been run for ten minutes, the "exhaust control H may be wholly or partially closed, depending on the temperature of the air? Owin to the fact thatv the fuel jet delivers directly into that portion of the coil which is heated by the lamp, the fuel is glwpys subjected to *a constant quantity of The order in which the heat is applied,

namely-first the constant heat from the factors contributing to the success of this combination.

The temperature of creasing r m 300 at t e lo est lea s the exhaust gases in i increases with the s eed and the load, inno exhaust is higher than the boiling point of the fuel, which boiling point is in the vicinity of 300 F., it follows that the variable heat of the exhaust gases is quite inadequate to take care of the complete vaporizatlon of the fuel at the lower engine speeds and loads, hence to the variable exhaust heat a constant heat furnished by L burner is provided.

What I claim is 1. In a vaporizer, a mixing chamber having an air entrance and a rich mixture entrance, 2. liquid fuel supply, a conduit conveying air and fuel from the fuel supply to said rich mixture entrance, one portion of said rich mixture conduit being heated by passing thru a chamber thru which pass the products of combustion from an independent heating burner and another portion of said conduit by the variable heat supplied from the exhaust of the engine to which the said vaporizer is attached.

2. In a vaporizer, a mixing chamber having an air entrance and a rich'mixture entrance, a liquid fuel supply, a conduit conveying air and fuel from said liquid fuel supply to said rich mixture entrance w-portion of said rich mixture conduit being heated continuously by an independent heating burner, the heat being applied to the outside of the said conduit, another portion of said conduit being heated at the same time the heating burner is in operation by the variable and adjustably controlled supply of exhaust heat from the .engine to which this said vaporizer is attached.

3. In a vaporizer, a mixing chamber having a main air entrance, a 1i uid fuel supply chamber, a metering ori ce regulating the flow of fuel therefrom, an auxiliary air passage into which the fuel is metered, said air passage conveying notover 20% of the air required for combustion, a conduit for conveying the rich mixture thereby formed from the fuel nozzle to the main air entrance, means for heating said rich mixture conduit by an independent heating burner, the heat being applied to the outside of said conduit, and means for simultaneously heating anotherv portion of the said conduit b means of a variable supply of heat availalile in the exhaust of the engine to which the said vaporizer is attached.

4. In a vaporizer, a mixing chamber having an air entrance and a rich mixture entrance, a liquid fuel supply, a conduit con- .veying-air and fuel from said liquid fuel supply to said rich mixture entrance, a portion of said rich mixture conduit being heated continuously by an independent heating burner, the heat being, applied to the outside of the said conduit, another portion of said conduit being heated at the same time that the heating burner is in operation by the variable supply of exhaust heat from the engine to whlch this said vaporizer is attached.

In testimony whereof I afiix my signature,

RAYMOND M. ANDERSON. 

